Carburetor



C. A. ROS] ER CARBURETOR File d June 14, 1955 June 4, 1935.

IN V EN TOR.

TTORNEY.

Patented June 4, 1935 UNIT E D S TAT E S PATENT OF-FfllCl-E? CARBURETOB I Charles A. Rosier, New York, NY. Application June 14, 1933,-Serial':N0. 675;653

' 9 Claims.

Ths invention relates to carburetors.

An object of this invention is to provide a carburetor'having highly improved means for increasingthe supply of air to the mixing chamber simultaneously with the increase in the supply of fuel.

A further object of this inventon is to provide in a'carburetor of the character described improved means for regulating the flow of air and fuel to the mixing chamber.

A stillfurther object of this invention is to provide a compact and'durable carburetor of the character described, comprising comparatively few and simple parts, which shall be relatively inexpensive to manufacture, smooth and positive in action and withal practical and efficient to a hig-h'degree in-use.

Other objects of this invention will in part be obvious and in part hereinafter pointed out.

The invention accordingly consistsin the features'of construction,combinations of elements, and arrangement of parts which will be exemplifled in the construction hereinafterdescribe'd, and of which the scope of application .will be indicated in the following claims.

In the accompanying drawing, which is shown one of the various possible illustrative embodiments of this invention, 7

Fig. 1 is an elevational view of the carburetor embodyingthe invention with parts broken away toshow the interior construction;

Fig. 2 is a top plan'view of the carburetor shown in Fig. 1, with parts broken away to show the interior construction;

Fig. 3 is an enlarged detail fragmentary view of' a portion of the carburetor shown in Fig. 1;

Fig. 4' is a cross-sectional view taken on line 4-4 of Fig. 1, on a reduced scale.

Referring now in detail to the drawing, 10 designates a carburetor embodying the'invention and comprises a float chamber I l preferably cylindrical in shape and having a bottom wall l2 formed with a downwardly extending nipple 12a. Extending from one side'of the chamber H and adjacent the bottom wall l2 isa tube-l3. Screwed to said nipple |2a is a fitting M in the form of a tube having a screw threaded'bottom end closed by a screw threaded plug l5 having a shoulder end l6. Said fitting also includes a tubular portion I1 extending at an angle and adapted to be attached to the gasoline supply tank. The nipple l2afor the purposehereinafter appearing, is formed with an inner conical or tapered opening 19; The top of the chamber l-l maybe closedby. 9.

cover 20. fixed, thereto and: having a centralupwardly extending tubular projection 2 I closed at the upper end. The stem 24. isslidablymounted Withinthe tubular, opening v of the. tubular portion 2| and extends. axially of the chamber LI 1 and is formed with a conical head 26 at the bottom thereof adapted to-contact the conical surface l9. Attachedto the stem- 24 near the top thereof is. a transverse pin 21. Slidablyreceived on said-stem is a floatingmember 28;of usualconstruction; and macl'eof cork or the like material and of hollow construction; M

It will now be understood that gasoline pass.- ing. throughthe tube I1 and through the-fltting M- may normally pass upwardly through the opening; l9 into the float chamber. However, should the levelof the gasoline withinthe chamber ll rise beyonda predetermined pointothe floating-member 28 will rise and by engagement with the transverse pin. 21. will .cause the stem 24' to be-slidably moved upwardly, the lower conical. end 26' thereof thus closing the conical or taperedbpening and shutting off the supply of gasoline. I When the quantity of gasoline within the chamber diminishes thefloating member, 28 will-.drop topermit the stem. 24:;to likewise be lowered for. opening the. passage I9. liixtendingfromthetube I3 is a; portion 30 having aflat upper surface 3|, and formed witha through screw threaded opening. 32 communicatingwithithe passage [3a in thetube l3, andextending. at. right angles thereto. Screwedto the screw threaded opening 30 is a member 35 having a nut 36 atthebottomthereof and being formed with: an internally screw threaded. opening. 38 .at' the upper endthereof, and with a through opening: 40 communicating with. the passage: 13a in. tube I3 Fixed to said. member 30;is aLcastins or member 42 having a cylindrical portion A3, the bottom endof which rests on the surface 3l:.of the portion 30.1. Extending from the cylindrical portion- 43, atright angles thereto, is another Cylindricalportionfih extending from said cylindrical portion 44 adjacent. the. juncture between said portion and the portion 43, is an outwardly tapering tubular portion 45 formed with a flange 4B and formingan: outlet passage. 45a adapted to communicate with the manifoldofan engine. The upper end of the portion 43 is formed with a flattened wall 41 having a screwthreaded opening. The member 42 may be attached to the portion 3I1 byv bolted contacting flanges, or inany othersuitable manner.

Screwed to, the opening 48- is acap forming an end wall to portion 44. The cylindricalpor- 2 tion 44 is further formed with a tubular open extension 50 substantially coaxial with the tubular portion 45 and diametrically disposed with respect thereto.

Mounted on the screw threaded member 35 and extending axially of the cylindrical portion 43 is a member 55 having a screw threaded nipple portion 56 at the bottom end thereof screwed to the internal screw threaded opening 38. Extending from the nipple is a nut portion 51, and extending from the nut portion is a tubular portion 53 having an enlarged head 60 at the upper end thereof. The portion 60 is formed with a fiat upper surface GI and a flat side surface 62 facing and disposed parallel to the cap 49. The tubular member 58 is formed with a central through passage 63 communicating with the opening 40, and passage I3a through the bottom end of the nipple 56. At the upper end thereof, the passage 63 is formed with a tapered opening or portion 64. The head 60 is formed with a passage 65 transverse to the passage 64 and communicating therewith. Said head is also formed with a tapered opening 67 coaxial with the passage 65 and communicating with the face 62 of said head. Fixed to the underside of the head 60 is a bracket I0 extending away from the cap and having a stop or shoulder portion I2 at the outer end thereof.

Slidably mounted within the passage 65 is a needle valve stem I6 having a head 11 at the outer end thereof. A small coil compression spring "I8 is interposed between the head 11 and the head 60 and normally serves to press the head 1'! against the stop 12. When the head 1'! contacts the stop 12, as shown in Fig. 1 of the drawing, the conical end of the stem I6 is spaced from the conical opening 61 so that both the openings 61 and 64 are open to permit the gas from the carburetor to flow therethrough. The diameter of the passage 63 is preferably somewhat greater'than thediameter of the valve stem I6 to permit fuel to pass around said stem to the opening 64, even when said valve stem is in closed position, as shown in Fig. 3 of the drawing.

1 Means is provided, however, to move the stem I6 into position for closing the opening 61. To this end, there is slidably mounted within the cylindrical portion 44 a cylindrical sleeve ,82 contacting the inner surface of said cylindrical portion. Thesleeve 82 is formed with a cut-out portion 83 adjacent the right end thereof, looking atFig. I, and another cut-out portion 86 on the bottom thereof. It will be noted that when the sleeve is pushed to the right, the passage or opening 45a will be closed except for a small portion 81 at the part uncovered by the cut-out portion 86, and a portion88 uncovered by the cut-out :portion 83.

When the sleeve 82, however, is moved to the left .to the position shown in Figs. 1 and 2 of the drawing, the passage 45a is substantially entirely uncovered. When the opening 45a is uncovered, a free flow of air and fuel may pass to the manifold, as will be more fully explained hereinafter.

For the purpose hereinafter appearing, the sleeve 62 is provided with a transverse pin 90,

and the outer end of the cylindrical portion 44 is likewise provided with a transverse pin 9|, substaiitially parallel to the pin 90. Said cylindrical portion is formed with a pair of diametrically disposed bearing openings 92 rotatably receiving said pin 9I. Said pin 9| extends beyond one of the bearing openings to the exterior of said cylindrical portion. There is fixed to said pin 9I a crank arm 95 which may be attached to a foot pedal or hand operated lever accessible to an operator. The pin 9| is provided with a central collar 96 within the cylindrical portion 44 and extending from said collar are a pair of spaced crank arms 91 carrying a pivot 98 at the outer end thereof. A link I00 interconnects the pivot pin 98 with the transverse pin 90.

It will now be understood that oscillation of the arm 95 will cause a reciprocating movement of the sleeve 82. Normally the parts are in the position shown in Fig. 3 of the drawing with the arm 95 pulled back and the sleeve substantially closing the port 45a and pressing the valve stem 16 to close the opening 61. With the parts in this position, a small amount of gasoline may pass through the passage 63 and around the valve stem and out through the opening 64 so that the motor may run at low speed supplied by a mixture of fuel and air through the portions 81 and 88 of the port or opening 45a.

Air may be supplied to the cylindrical portion 44' by means of an elbow I05 fixed to the outer end I06 of said cylindrical portion 44 and having attached thereto a spaced hood I01. Fixed to the elbow I65 is a transverse pin I08 carrying a butterfly valve I09. On the outside of the elbow there is fixed to the pin I08 an arm I I0 connected through suitable mechanism to a point where the operator may actuate the valve I09 which serves as a choke. The hood I0! is, of course, spaced from the upper end of the elbow I05 to permit air to pass through the elbow and through the cylindrical portion 44 to the port 450..

An additional supply of air may be admitted when the valve 61 is open, through the tube 50. A transverse screen 5I is preferably attached within the tube 50 to prevent particles of dirt from entering the carburetor.

It will now be understood that, normally, with the parts as shown in Fig. 3 of the drawing, the

sleeve 82 is in closed position and merely leaves a small portion of the outlet passage 45a open. Some air may pass through the elbow I05 and a small amount of fuel passing through the opening 64 supplies some mixture to the motor. When it is desired, however, to accelerate the motor, the arm 95 is pushed forward to retract the sleeve and uncover the port 45a. Simultaneously with this motion, the spring 18 pushes the valve I6 to the left to uncover the opening 61 and increase the supply of gasoline.

It will be understood that the sleeve 82 also closes the tube 50 when the outlet opening 45a is closed. When the sleeve is moved to the position shown in Figs. 1 and 2 the tube or air port 50 is uncovered to increase the supply of air. The supply of air is thus increased simultaneously with the opening of the valve 61 for the admission of an additional supply of fuel.

Gasified and expanded hydrocarbon fuel, for example, from a. retort such as shown and described in my co-pending application, Serial No. 551,016, filed July 15th, 1931, may also be supplied, as illustrated in Figs. 1 and 4 of the drawing. To this end, a supply tube I20 carrying gasified hydrocarbon oil from a retort, may pass upwardly into the chamber 45a, said tube I20 being provided with a valve I2 I. Thus after the motor is started, the supply of gas may be shut off and a valve I24 in the tube I20 opened to feed the gasified hydrocarbon oil to the manifold.

The tube I20 is provided with an angular extension II4 axially disposed within the outlet opening 45a and provided with a valve pocket.

Screwed'to the outer end of the) ftubularfportion Mfand' closing sa'id' pocket, is a cap I122 provided w'ithpin' openings I23. j The tube H 4 is further formed with 'ajvalve seat at the inner-"end of 'saidpocket, Coveringani'axial openingl'll for the passage of the gaseous'hydrocarbonfuel, and seated on'the valveseat is a snrall one way'check valve HBIc mprising a pair'of curved,fparallel notched flanges interconnected by a shortstem; The valve H fl'ismaintained on saidseat'by'means of f a coil compression spring I l 9 interposed' be tween said valve and the capfIZZ'; be 'unde'rstood that when the pressure" in the manifold decreases,"the' valve member I twill beunseated' and permitthe gaseous fuel to pass through the notches. in saidmember and through the pin opening I23 intothe manifold. 1 f

' It will thus be seen that there is provided a device" in which the several objects ofthis invention are achieved; and which is well adapted'to meettheconditionsof practical use.

As various possible embodiments might be made of the above invention, and as various changes might be made in the embodiment set forth, it is to be understood that all matter herein set forth or shown in the accompanying drawing is to be interpreted as illustrative and not in a limiting sense.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:-

1. In a carburetor, a member having a cylindrical portion, a second cylindrical portion extending at right angles to said first cylindrical portion and having an outlet adapted to communicate with the manifold of an engine, a tubular fuel supply member extending within said first cylindrical portion and projecting into said second cylindrical portion, means for supplying fuel to said tubular member, said tubular member having an axial opening, a valve stem slidably mounted on said tubular member and disposed at right angles to and crossing said axial opening, a sleeve slidably mounted within and engaging the inner surface of said second cylindrical portion and adapted to control said outlet, and means for causing sliding movement of said sleeve and said valve stem.

2. In a carburetor, a member having a cylindrical portion, a second cylindrical portion extending at right angles to said first cylindrical portion and having an outlet adapted to communicate with the manifold of an engine, a tubular fuel supply member extending within said first cylindrical portion and projecting into said second cylindrical portion, said tubular member having an axial opening, a valve stem slidably mounted on said tubular member and disposed at right angles to and crossing said axial opening, a sleeve slidably mounted within and engaging the inner surface of said second cylindrical portion for closing said outlet, means for causing sliding movement of said sleeve and valve stem, said second cylindrical portion being formed with an air port, said sleeve being adapted to close said air port and being movable to a position for opening said air port,

3. In a carburetor, a member having a cylindrical portion, a second cylindrical portion extending at right angles to said first cylindrical portion and having an outlet adapted to communicate with the -manifold of an engine, a tubular fuel supply member extending within said first cylindrical portion and projecting into said second cylindrical portion, said tubular member having an axial opening, a valve .It will now emx i vmquhied' anddisposedat rightanglestdand crosshig sa d axial opening, a sleeve slidably mountedwitl'iin nd"' 'engagin'g ftheflinner'f s urface"'of' said second inovement-of sa sleeve andvalveistern; s (1 secondcylindricalpo ;ion*being formd with an 'air port and' withan outletpassage adapted 'to "m municate" withsaid manifold, I said "e being adapted' tob-inovdintoloverlappiiig tion withfr espect to said-passagefiridminport g 4, I'n' combination, a cylindrical memb'e" an tuoetq assage communicating withsaid ber; tube -extendingintosaid meiriberfor 'ing fuel theretoj va'1vssgms1iaab1y mounted on saidftube a'sleeve slidablymounted'within 'sdid cylindrical member and contacting uie'iiiner surface thereof, i said sleeve being movable into' o er lappingrelation with respect to'said outlet passage, a transverse "pin rrlount'edo said slevei'a transverse pin on said cylindrica'l ember paral- 'lel to "said first transverse jpinjsfaid' second pin extending to the 'izdierior' of said 7? cylindrical member, an arm fixed to the extending portion of said second pin, an arm fixed to a portion of said second pin within said cylindrical member, a link interconnecting the outer end of said second arm with said first pin, said sleeve having a part thereon adapted to contact said valve stem.

5. In combination, a cylindrical member, an outlet passage communicating with said member, said member being formed with an air port, a tube extending into said member for feeding fuel thereto, a valve stem slidably mounted on said tube, a sleeve slidably mounted within said cylindrical member and contacting the inner surface thereof, said sleeve being movable into overlapping relation with respect to said outlet passage and air port, a transverse pin mounted on said sleeve, a transverse pin on said cylindrical member parallel to said first transverse pin, said second pin extending to the exterior of said cylindrical member, an arm fixed to the extending portion of said second pin, an arm fixed to a portion of said second pin within said cylindrical member, a link interconnecting the outer end of said second arm with said first pin, said sleeve having a part thereon adapted to contact said valve stem.

6. In a carburetor, a chamber, a tubular member extending within said chamber, means for supplying fuel to said tubular member, said tubular member having an outlet opening for normally supplying a small amount of fuel to said chamber, said tubular member having a second opening, a valve stem slidably mounted on said tubular member and disposed at right angles to said tubular member, and adapted to close said second opening, means for holding said stem in closing position, and spring means for moving said valve stem to uncover said second opening upon releasing said stem.

7. In a carburetor, a chamber, a tubular member extending within said chamber, means for supplying fuel to said tubular member, said tubular member having an outlet opening'for normally supplying a small amount of fuel to said chamber, said tubular member having a second opening, a valve stem slidably mounted on said tubular member and adapted to close said second opening, means for holding said stem in closing position, spring means for moving said valve stem to uncover said second opening upon releasing said stem, said chamber being provided with an outlet passage adapted to be connected to the cylindrical 50 ion, means*"for""causing llding manitold of-an engine, and means associated with said holding means for controlling said outlet passage.

8.- In a carburetor, a chamber, a tubular member extending within said chamber, means -for supplying fuel to said tubular member, said tubular member having an outlet opening for normally supplying a small amount of fuel to said chamber, said tubular member having asecond opening, a valve stem slidably mounted on said tubular member and adapted to close said second opening, means for holding said stemin closing position, spring means for uncovering said second opening upon releasing said stem, said chamber being provided'with an outlet passage adapted to beconnected to the manifold of an engine, and means associated with said holding means for controlling said outlet passage, said chamber being provided with an air port and said holding means being adapted to control said air port. 7

9. In a carburetor a cylindrical member having an outlet opening adapted to communicate withthe manifold of an engine, means for supplying fuel to said member, comprising a tubular member projecting therein and a float chamber connected to said tubular member, said tubular member having an opening, a spring pressed valve controlling said last-mentioned opening, a sleeve slidably mounted within said cylindrical member, means for moving said sleeve to overlapping position with respect to said outlet opening and means associated with said sleeve for moving said valve against the pressure of its spring, said valve being normally held in open position by said spring when said sleeve uncovers said outlet opening, and said sleeve being adapted to move said valve to closing position when said sleeve is moved to a position covering said outlet opening, said cylindrical member being provided with an air port aligned with said outlet opening and likewise being controlled by said sleeve, a passage having a hood at the end thereof and communicating with said cylindrical member and manual means for controlling the supply of air from said passage.

CHARLES A. ROSIER. 

